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Aim and Background: People differ in how they process information. Assessment of such differencess is helpfull for understanding and predicting behavior in a variety of contexts. One of tht most important measure of individual differences in Information Processing is the Intuitive-Rational- Inventory, and the purpose of the present research is to investigate the psychometric properties of Persian version of this Inventory in university students’ population. Methods and Materials: First, the Inventory was translated into Farsi. Then, it was retranslated into English and compared with the original version to find and correct the gaps between  the translated version and the original version. Finally, after the pilot study and resolving the mistakes, the final questionnaire was carried out for sample group consisting of 335 students studying in Humanities Sciences in Tabriz Payame Noor University. The data were analysed by using SPSS-18 softwar. Findings: In this study, Exploratory Factor Analysis (EFA) was conducted on the 40 items of the inventory, using a Principal Component Analysis, with Varimax Rotation. Cattell’s scree plot and Horn’s parallel analysis indicated the two factor solutions. Examination of communalities table revealed 18 items (nine each from the rational and experiential scales) with low internal consistency. These items were deleted and a second Principal Component factor analysis was conducted on the remaining 22 items. The resulte showed the two factors clearly. The first factor accounted for 18% and the second factor about 16% of the variance in the item set. As in the original scale, these factors were called Intuitive and rational Information Processing styles. To determine its validity item- total correlations and item discrimination power calculated. The reliability of the Intuitive-Rational Inventory was obtained by internal consistency (cronbach alpha) and test- retest methods. Cronbach's Alpha coefficient for Intuitive and rational Information Processing styles was 0.80 and 0.77; and correlation coefficient after four weeks retest was 0.90 and 0.94, respectively. Cronbach's Alpha and test- retest coefficient showed that reliability of factors is acceptable. Conclusions: Results at this study showed that Intuitive-Rational- Inventory has psychometric properties for utilizing in psychological research, clinical diagnostics and counseling.

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Aim and Background: Disruptive Mood Dysregulation Disorder (DMDD) is one of the mood disorders of the fifth edition of the mental disorder’s diagnosis. This disorder begins in the childhood and causes many problems for parents, teachers, friends, and children themselves. This disorder, which is associated with social problems, is also very debilitating. The present study was conducted with the aim of constructing and initial reliability of the disruptive mood dysregulation disorder scale.
Methods and Materials: The method of this research is descriptive and instrument making; while its statistical population is all parents of children aged 6-12 year in Isfahan in the year 1397. Statistical samples included 300 people which were selected by available sampling. To collect the data for evaluation of this disorder, the researcher-made Disruptive Mood Dysregulation Disorder Scale (DMDDS) was used. To examine the scale items, quantitative and qualitative content reliability, quantitative and qualitative nominal reliability, Exploratory Factor Analysis (EFA) with varimax rotation, Confirmatory Factor Analysis (CFA), and Cronbach's alpha coefficient were used.
Findings: Based on the parameters of impact coefficient index above 1.5, content reliability index above 0.62, reliability ratio above 0.70, and the exploratory and confirmatory factor analysis’s, 24 scale items were kept in the instrument. Considering an eigenvalue above 1, four factors of impulsivity, performance, mood, and frustration were extracted. According to the obtained results, the four factors of this scale were able to predict 50.80% of the changes in the total scale. Also, a total scale reliability coefficient of 0.894 was obtained by Cronbach's alpha method.
Conclusions: Based on the results of this study, the content reliability index as well as the nominal and structural scale which are designed for the parents, are acceptable and can be used to evaluate the disruptive mood dysregulation disorder in children aged 6-12 year.